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Biology 17 Online
OpenStudy (anonymous):

1. Scientists believe that ancient ancestors of all animals were (1 point) *single-celled prokaryotes that reproduced asexually. *single-celled eukaryotes that sometimes grew in colonies. *multicellular organisms that were probably autotrophic. *multicellular organisms with an alternation of generations lifecycle. 2. The Cambrian Explosion resulted in the evolution of the first (1 point) *dinosaurs and mammals. *representatives of most animal phyla. *bacteria. *land animals. 3. Which of the following occurred before the Cambrian Explosion? (1 point) *Animals acquired sp

OpenStudy (koikkara):

2. Land animals....

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